[automerger skipped] [RESTRICT AUTOMERGE]Only allow system and same app to apply relinquishTaskIdentity am: 2844258da4 -s ours

am skip reason: skipped by user chengjeff

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16565827

Change-Id: I7c75099132629b6ae40dc53a958140bdc1b27100